This website may be of great help to anyone who does not have the financial means to provide good veterinary care, but whose dog (or indeed, other pet) needs emergency treatment.
It might be wise to read every word on this site, just so you know exactly the requirements, and what to do. I'm afraid I haven't yet had time to read it all. I believe this is for the U.S. only.
http://www.IMOM.org
[N.B.
Due to the current economic crisis and decline in donations, IMOM presently accepts applications for life threatening emergencies only. Life threatening emergencies are defined as follows:
A life threatening emergency exists when it has been confirmed in writing by a veterinarian that your pet will die or have to be humanely euthanized if care is not provided within ten days from the date of diagnosis.]